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virtio-scsi.h: Add virtio_scsi_cmd_req_pi + VIRTIO_SCSI_F_T10_PI bits

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This patch adds a virtio_scsi_cmd_req_pi header as recommened by
Paolo that contains pi_bytesout + pi_bytesin elements used for
signaling when protection information buffers (in bytes) are
expected to preceed the data payload buffers.

Also add new VIRTIO_SCSI_F_T10_PI feature bit to be used to signal
host support.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagig@dev.mellanox.co.il>
Cc: H. Peter Anvin <hpa@zytor.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2014-03-16 14:51:35 -07:00
parent 5f80ff8ecc
commit 1b49dcf3d7
1 changed files with 14 additions and 1 deletions
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15
include/linux/virtio_scsi.h
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@ -35,11 +35,23 @@ struct virtio_scsi_cmd_req {
u8 lun[8]; /* Logical Unit Number */
u64 tag; /* Command identifier */
u8 task_attr; /* Task attribute */
u8 prio;
u8 prio; /* SAM command priority field */
u8 crn;
u8 cdb[VIRTIO_SCSI_CDB_SIZE];
} __packed;
/* SCSI command request, followed by protection information */
struct virtio_scsi_cmd_req_pi {
u8 lun[8]; /* Logical Unit Number */
u64 tag; /* Command identifier */
u8 task_attr; /* Task attribute */
u8 prio; /* SAM command priority field */
u8 crn;
u32 pi_bytesout; /* DataOUT PI Number of bytes */
u32 pi_bytesin; /* DataIN PI Number of bytes */
u8 cdb[VIRTIO_SCSI_CDB_SIZE];
} __packed;
/* Response, followed by sense data and data-in */
struct virtio_scsi_cmd_resp {
u32 sense_len; /* Sense data length */
@ -97,6 +109,7 @@ struct virtio_scsi_config {
#define VIRTIO_SCSI_F_INOUT 0
#define VIRTIO_SCSI_F_HOTPLUG 1
#define VIRTIO_SCSI_F_CHANGE 2
#define VIRTIO_SCSI_F_T10_PI 3
/* Response codes */
#define VIRTIO_SCSI_S_OK 0